﻿// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Core.Common;

public static class ByteConverter
{
    public static long GetInMBytes(long bytes)
    {
        const long MB = 1024 * 1024;

        return bytes < MB * MB ? bytes / MB : bytes;
    }

    public static long GetInBytes(long bytes)
    {
        const long MB = 1024 * 1024;

        return bytes < MB ? bytes * MB : bytes;
    }

    public static long ConvertSizeToBytes(string size)
    {
        long bytes = 0;
        try
        {
            var regex = new Regex(@"\d+|\w+");
            var matches = regex.Matches(size);
            if (matches.Count > 0)
            {
                var num = int.Parse(matches[0].Value);
                var unit = matches[1].Value.ToLower();
                switch (unit)
                {
                    case "bytes":
                        bytes = num;
                        break;
                    case "kb":
                        bytes = num * 1024;
                        break;
                    case "mb":
                        bytes = Convert.ToInt64(num * Math.Pow(1024, 2));
                        break;
                    case "gb":
                        bytes = Convert.ToInt64(num * Math.Pow(1024, 3));
                        break;
                    case "tb":
                        bytes = Convert.ToInt64(num * Math.Pow(1024, 4));
                        break;
                    case "pb":
                        bytes = Convert.ToInt64(num * Math.Pow(1024, 5));
                        break;
                }
                return bytes;
            }
        }
        catch (Exception)
        {
        }

        return -1;
    }
}
